* gdb.threads/linux-dp.exp: Unset 'seen' before 'array set'.

[deliverable/binutils-gdb.git] / gdb / inf-child.c

diff --git a/gdb/inf-child.c b/gdb/inf-child.c
index b0d9c6996f3a2e397d0e1344e38f2ee31c508711..5531102314bcc15ff3caf22973eb63136828abbf 100644 (file)
--- a/gdb/inf-child.c
+++ b/gdb/inf-child.c
@@ -1,14 +1,14 @@
 /* Default child (native) target interface, for GDB when running under
    Unix.
 
 /* Default child (native) target interface, for GDB when running under
    Unix.
 

-   Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
-   1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1988-1996, 1998-2002, 2004-2005, 2007-2012 Free
+   Software Foundation, Inc.

 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or

    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -17,9 +17,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License

-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #include "defs.h"
 #include "regcache.h"
 
 #include "defs.h"
 #include "regcache.h"


@@ -28,27 +26,42 @@
 #include "target.h"
 #include "inferior.h"
 #include "gdb_string.h"
 #include "target.h"
 #include "inferior.h"
 #include "gdb_string.h"

+#include "gdb_stat.h"
+#include "inf-child.h"
+#include "gdb/fileio.h"
+#include "agent.h"
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>         /* for MAXPATHLEN */
+#endif
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>

 
 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
    for all registers.  */
 
 static void
 
 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
    for all registers.  */
 
 static void

-inf_child_fetch_inferior_registers (int regnum)
+inf_child_fetch_inferior_registers (struct target_ops *ops,
+                                   struct regcache *regcache, int regnum)

 {
   if (regnum == -1)
     {
 {
   if (regnum == -1)
     {

-      for (regnum = 0; regnum < NUM_REGS; regnum++)
-       regcache_raw_supply (current_regcache, regnum, NULL);
+      for (regnum = 0;
+          regnum < gdbarch_num_regs (get_regcache_arch (regcache));
+          regnum++)
+       regcache_raw_supply (regcache, regnum, NULL);

     }
   else
     }
   else

-    regcache_raw_supply (current_regcache, regnum, NULL);
+    regcache_raw_supply (regcache, regnum, NULL);

 }
 
 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
    this for all registers (including the floating point registers).  */
 
 static void
 }
 
 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
    this for all registers (including the floating point registers).  */
 
 static void

-inf_child_store_inferior_registers (int regnum)
+inf_child_store_inferior_registers (struct target_ops *ops,
+                                   struct regcache *regcache, int regnum)

 {
 }
 
 {
 }
 


@@ -66,14 +79,14 @@ inf_child_post_attach (int pid)
    program being debugged.  */
 
 static void
    program being debugged.  */
 
 static void

-inf_child_prepare_to_store (void)
+inf_child_prepare_to_store (struct regcache *regcache)

 {
 }
 
 static void
 inf_child_open (char *arg, int from_tty)
 {
 {
 }
 
 static void
 inf_child_open (char *arg, int from_tty)
 {

-  error ("Use the \"run\" command to start a Unix child process.");
+  error (_("Use the \"run\" command to start a Unix child process."));

 }
 
 static void
 }
 
 static void


@@ -83,105 +96,266 @@ inf_child_post_startup_inferior (ptid_t ptid)
      inferior" operation by a debugger.  */
 }
 
      inferior" operation by a debugger.  */
 }
 

-static void
-inf_child_acknowledge_created_inferior (int pid)
-{
-  /* This version of Unix doesn't require a meaningful "acknowledge
-     created inferior" operation by a debugger.  */
-}
-
-static void
-inf_child_insert_fork_catchpoint (int pid)
+static int
+inf_child_follow_fork (struct target_ops *ops, int follow_child)

 {
 {

-  /* This version of Unix doesn't support notification of fork
+  /* This version of Unix doesn't support following fork or vfork

      events.  */
      events.  */

+  return 0;

 }
 
 static int
 }
 
 static int

-inf_child_remove_fork_catchpoint (int pid)
+inf_child_can_run (void)

 {
 {

-  /* This version of Unix doesn't support notification of fork
-     events.  */
-  return 0;
+  return 1;

 }
 
 }
 

-static void
-inf_child_insert_vfork_catchpoint (int pid)
+static char *
+inf_child_pid_to_exec_file (int pid)

 {
 {

-  /* This version of Unix doesn't support notification of vfork
-     events.  */
+  /* This version of Unix doesn't support translation of a process ID
+     to the filename of the executable file.  */
+  return NULL;

 }
 
 }
 

+
+/* Target file operations.  */
+

 static int
 static int

-inf_child_remove_vfork_catchpoint (int pid)
+inf_child_fileio_open_flags_to_host (int fileio_open_flags, int *open_flags_p)

 {
 {

-  /* This version of Unix doesn't support notification of vfork
-     events.  */
+  int open_flags = 0;
+
+  if (fileio_open_flags & ~FILEIO_O_SUPPORTED)
+    return -1;
+
+  if (fileio_open_flags & FILEIO_O_CREAT)
+    open_flags |= O_CREAT;
+  if (fileio_open_flags & FILEIO_O_EXCL)
+    open_flags |= O_EXCL;
+  if (fileio_open_flags & FILEIO_O_TRUNC)
+    open_flags |= O_TRUNC;
+  if (fileio_open_flags & FILEIO_O_APPEND)
+    open_flags |= O_APPEND;
+  if (fileio_open_flags & FILEIO_O_RDONLY)
+    open_flags |= O_RDONLY;
+  if (fileio_open_flags & FILEIO_O_WRONLY)
+    open_flags |= O_WRONLY;
+  if (fileio_open_flags & FILEIO_O_RDWR)
+    open_flags |= O_RDWR;
+/* On systems supporting binary and text mode, always open files in
+   binary mode. */
+#ifdef O_BINARY
+  open_flags |= O_BINARY;
+#endif
+
+  *open_flags_p = open_flags;

   return 0;
 }
 
 static int
   return 0;
 }
 
 static int

-inf_child_follow_fork (int follow_child)
+inf_child_errno_to_fileio_error (int errnum)

 {
 {

-  /* This version of Unix doesn't support following fork or vfork
-     events.  */
-  return 0;
+  switch (errnum)
+    {
+      case EPERM:
+        return FILEIO_EPERM;
+      case ENOENT:
+        return FILEIO_ENOENT;
+      case EINTR:
+        return FILEIO_EINTR;
+      case EIO:
+        return FILEIO_EIO;
+      case EBADF:
+        return FILEIO_EBADF;
+      case EACCES:
+        return FILEIO_EACCES;
+      case EFAULT:
+        return FILEIO_EFAULT;
+      case EBUSY:
+        return FILEIO_EBUSY;
+      case EEXIST:
+        return FILEIO_EEXIST;
+      case ENODEV:
+        return FILEIO_ENODEV;
+      case ENOTDIR:
+        return FILEIO_ENOTDIR;
+      case EISDIR:
+        return FILEIO_EISDIR;
+      case EINVAL:
+        return FILEIO_EINVAL;
+      case ENFILE:
+        return FILEIO_ENFILE;
+      case EMFILE:
+        return FILEIO_EMFILE;
+      case EFBIG:
+        return FILEIO_EFBIG;
+      case ENOSPC:
+        return FILEIO_ENOSPC;
+      case ESPIPE:
+        return FILEIO_ESPIPE;
+      case EROFS:
+        return FILEIO_EROFS;
+      case ENOSYS:
+        return FILEIO_ENOSYS;
+      case ENAMETOOLONG:
+        return FILEIO_ENAMETOOLONG;
+    }
+  return FILEIO_EUNKNOWN;

 }
 
 }
 

-static void
-inf_child_insert_exec_catchpoint (int pid)
+/* Open FILENAME on the target, using FLAGS and MODE.  Return a
+   target file descriptor, or -1 if an error occurs (and set
+   *TARGET_ERRNO).  */
+static int
+inf_child_fileio_open (const char *filename, int flags, int mode,
+                      int *target_errno)

 {
 {

-  /* This version of Unix doesn't support notification of exec
-     events.  */
+  int nat_flags;
+  int fd;
+
+  if (inf_child_fileio_open_flags_to_host (flags, &nat_flags) == -1)
+    {
+      *target_errno = FILEIO_EINVAL;
+      return -1;
+    }
+
+  /* We do not need to convert MODE, since the fileio protocol uses
+     the standard values.  */
+  fd = open (filename, nat_flags, mode);
+  if (fd == -1)
+    *target_errno = inf_child_errno_to_fileio_error (errno);
+
+  return fd;

 }
 
 }
 

+/* Write up to LEN bytes from WRITE_BUF to FD on the target.
+   Return the number of bytes written, or -1 if an error occurs
+   (and set *TARGET_ERRNO).  */

 static int
 static int

-inf_child_remove_exec_catchpoint (int pid)
+inf_child_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
+                        ULONGEST offset, int *target_errno)

 {
 {

-  /* This version of Unix doesn't support notification of exec
-     events.  */
-  return 0;
+  int ret;
+
+#ifdef HAVE_PWRITE
+  ret = pwrite (fd, write_buf, len, (long) offset);
+#else
+  ret = lseek (fd, (long) offset, SEEK_SET);
+  if (ret != -1)
+    ret = write (fd, write_buf, len);
+#endif
+
+  if (ret == -1)
+    *target_errno = inf_child_errno_to_fileio_error (errno);
+
+  return ret;

 }
 
 }
 

+/* Read up to LEN bytes FD on the target into READ_BUF.
+   Return the number of bytes read, or -1 if an error occurs
+   (and set *TARGET_ERRNO).  */

 static int
 static int

-inf_child_reported_exec_events_per_exec_call (void)
+inf_child_fileio_pread (int fd, gdb_byte *read_buf, int len,
+                       ULONGEST offset, int *target_errno)

 {
 {

-  /* This version of Unix doesn't support notification of exec
-     events.  */
-  return 1;
+  int ret;
+
+#ifdef HAVE_PREAD
+  ret = pread (fd, read_buf, len, (long) offset);
+#else
+  ret = lseek (fd, (long) offset, SEEK_SET);
+  if (ret != -1)
+    ret = read (fd, read_buf, len);
+#endif
+
+  if (ret == -1)
+    *target_errno = inf_child_errno_to_fileio_error (errno);
+
+  return ret;

 }
 
 }
 

+/* Close FD on the target.  Return 0, or -1 if an error occurs
+   (and set *TARGET_ERRNO).  */

 static int
 static int

-inf_child_can_run (void)
+inf_child_fileio_close (int fd, int *target_errno)

 {
 {

-  return 1;
-}
+  int ret;

 
 

-static struct symtab_and_line *
-inf_child_enable_exception_callback (enum exception_event_kind kind,
-                                    int enable)
-{
-  return (struct symtab_and_line *) NULL;
+  ret = close (fd);
+  if (ret == -1)
+    *target_errno = inf_child_errno_to_fileio_error (errno);
+
+  return ret;

 }
 
 }
 

-static struct exception_event_record *
-inf_child_get_current_exception_event (void)
+/* Unlink FILENAME on the target.  Return 0, or -1 if an error
+   occurs (and set *TARGET_ERRNO).  */
+static int
+inf_child_fileio_unlink (const char *filename, int *target_errno)

 {
 {

-  return (struct exception_event_record *) NULL;
+  int ret;
+
+  ret = unlink (filename);
+  if (ret == -1)
+    *target_errno = inf_child_errno_to_fileio_error (errno);
+
+  return ret;

 }
 
 }
 

+/* Read value of symbolic link FILENAME on the target.  Return a
+   null-terminated string allocated via xmalloc, or NULL if an error
+   occurs (and set *TARGET_ERRNO).  */

 static char *
 static char *

-inf_child_pid_to_exec_file (int pid)
+inf_child_fileio_readlink (const char *filename, int *target_errno)

 {
 {

-  /* This version of Unix doesn't support translation of a process ID
-     to the filename of the executable file.  */
+  /* We support readlink only on systems that also provide a compile-time
+     maximum path length (MAXPATHLEN), at least for now.  */
+#if defined (HAVE_READLINK) && defined (MAXPATHLEN)
+  char buf[MAXPATHLEN];
+  int len;
+  char *ret;
+
+  len = readlink (filename, buf, sizeof buf);
+  if (len < 0)
+    {
+      *target_errno = inf_child_errno_to_fileio_error (errno);
+      return NULL;
+    }
+
+  ret = xmalloc (len + 1);
+  memcpy (ret, buf, len);
+  ret[len] = '\0';
+  return ret;
+#else
+  *target_errno = FILEIO_ENOSYS;

   return NULL;
   return NULL;

+#endif
+}
+
+static int
+inf_child_use_agent (int use)
+{
+  if (agent_loaded_p ())
+    {
+      use_agent = use;
+      return 1;
+    }
+  else
+    return 0;
+}
+
+static int
+inf_child_can_use_agent (void)
+{
+  return agent_loaded_p ();

 }
 
 struct target_ops *
 inf_child_target (void)
 {
   struct target_ops *t = XZALLOC (struct target_ops);
 }
 
 struct target_ops *
 inf_child_target (void)
 {
   struct target_ops *t = XZALLOC (struct target_ops);

+

   t->to_shortname = "child";
   t->to_longname = "Unix child process";
   t->to_doc = "Unix child process (started by the \"run\" command).";
   t->to_shortname = "child";
   t->to_longname = "Unix child process";
   t->to_doc = "Unix child process (started by the \"run\" command).";


@@ -199,26 +373,23 @@ inf_child_target (void)
   t->to_terminal_ours = terminal_ours;
   t->to_terminal_info = child_terminal_info;
   t->to_post_startup_inferior = inf_child_post_startup_inferior;
   t->to_terminal_ours = terminal_ours;
   t->to_terminal_info = child_terminal_info;
   t->to_post_startup_inferior = inf_child_post_startup_inferior;

-  t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior;
-  t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint;
-  t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint;
-  t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint;
-  t->to_remove_vfork_catchpoint = inf_child_remove_vfork_catchpoint;

   t->to_follow_fork = inf_child_follow_fork;
   t->to_follow_fork = inf_child_follow_fork;

-  t->to_insert_exec_catchpoint = inf_child_insert_exec_catchpoint;
-  t->to_remove_exec_catchpoint = inf_child_remove_exec_catchpoint;
-  t->to_reported_exec_events_per_exec_call =
-    inf_child_reported_exec_events_per_exec_call;

   t->to_can_run = inf_child_can_run;
   t->to_can_run = inf_child_can_run;

-  t->to_enable_exception_callback = inf_child_enable_exception_callback;
-  t->to_get_current_exception_event = inf_child_get_current_exception_event;

   t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
   t->to_stratum = process_stratum;
   t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
   t->to_stratum = process_stratum;

-  t->to_has_all_memory = 1;
-  t->to_has_memory = 1;
-  t->to_has_stack = 1;
-  t->to_has_registers = 1;
-  t->to_has_execution = 1;
+  t->to_has_all_memory = default_child_has_all_memory;
+  t->to_has_memory = default_child_has_memory;
+  t->to_has_stack = default_child_has_stack;
+  t->to_has_registers = default_child_has_registers;
+  t->to_has_execution = default_child_has_execution;
+  t->to_fileio_open = inf_child_fileio_open;
+  t->to_fileio_pwrite = inf_child_fileio_pwrite;
+  t->to_fileio_pread = inf_child_fileio_pread;
+  t->to_fileio_close = inf_child_fileio_close;
+  t->to_fileio_unlink = inf_child_fileio_unlink;
+  t->to_fileio_readlink = inf_child_fileio_readlink;

   t->to_magic = OPS_MAGIC;
   t->to_magic = OPS_MAGIC;

+  t->to_use_agent = inf_child_use_agent;
+  t->to_can_use_agent = inf_child_can_use_agent;

   return t;
 }
   return t;
 }